Custom Firmware? Or is it there another solution?

Hi Guys and Gals,

I've modified my MidiFighter Classic a notch, and added two Pots, two faders and "four Buttons".
Then I realised, that if i set the four Banks mode to internal (using the first row at the mfc) the Parameters at the fader, pots and buttons don't change the midi Output :(

I would like to know, if and how it's possible, to use the internal bank mode and get other mididata from the external Inputs I soldered.

Do i need a custom Firmware?